Browsing by Author "Oliveira, Carla Padrel de"
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- 2008 Ano Internacional do Planeta Terra: Terra, saúde e alterações climáticasPublication . Amador, Filomena; Oliveira, Carla Padrel de; Cardoso, Abel; Antunes, Ana PaulaAs causas ambientais de alguns problemas de saúde, relação entre alterações climáticas e saúde e as dinâmicas de algumas doenças emergentes no quadro das relações humanas com o meio ambiente. Visita ao Jardim Tropical de Lisboa, com os Professores Carla Oliveira, docente da Universidade Aberta e Jorge Atouguia, médico especialista em Medicina Tropical.
- An industrial reference fluid for moderately high viscosityPublication . Oliveira, Carla Padrel de; Caetano, Fernando J. P.; Fareleira, João M. N. A.; Fröba, Andreas P.; Harris, Kenneth R.; Leipertz, Alfred; Trusler, J. P. Martin; Wakeham, William A.In industrial practice, there is a demand for a reference standard for viscosity that is established for a readily available fluid to simplify the calibration of industrial viscometers for moderately high viscosities [(50 to 125) mPa · s]. Diisodecyl phthalate (DIDP) has been suggested as that reference fluid, and a number of studies of its properties have been carried out in several laboratories throughout the world, within the auspices of a project coordinated by the International Association for Transport Properties. That project has now progressed to the point where it is possible to collate the results of studies of the viscosity of the fluid by a number of different techniques, so as to lead to a proposed standard reference value which will be included in the paper. To support this recommended value, the various measurements conducted have been critically reviewed, and the sample purity and other factors affecting the viscosity have been studied. Density and surface tension measurements have also been performed. This paper does not describe the individual viscosity determinations carried out in independent laboratories because these are the subject of individual publications, but it does describe the ancillary studies conducted and their relevance to the viscosity standard. In addition, the paper contains recommended values for the viscosity of liquid DIDP. The samples of DIDP to which the recommended values refer are isomeric mixtures available commercially from certain suppliers, with a minimum purity by gas chromatography of 99.8 %. The recommended values result from a critical examination of all the measurements conducted to date and are supported by careful arguments dealing with the likely effects of the isomeric content of the sample as well as of other impurities. The proposed reference standard is intended particularly to serve an industrial need for a readily available calibration material with a viscosity close to that required in practical situations. To that end, the recommended value has an overall relative uncertainty of approximately 1 %. It is therefore not intended to supersede for the reference value for the viscosity of water at 20 °C, which is known much more accurately, but rather to complement it.
- Ano Internacional da Química 2011: o que é a química?Publication . Caetano, Fernando J. P.; Oliveira, Carla Padrel de; Oliveira, PauloBreve explicação sobre o que é a Química. Participação do Professor Jorge Calado, do Departamento de Engenharia Química do Instituto Superior Técnico e Presidente da Comissão Nacional para o AIQ Ano Internacional da Química 2011.
- Ano Internacional da Química 2011: os mitos da químicaPublication . Caetano, Fernando J. P.; Oliveira, Carla Padrel de; Oliveira, PauloDesmistificação de alguns mitos da Química. O que é a Química? Participação do Professor Jorge Calado, do Departamento de Engenharia Química do Instituto Superior Técnico e Presidente da Comissão Nacional para o AIQ-Ano Internacional da Química, 2011.
- Ano Internacional da Química 2011: porquê 2011?Publication . Caetano, Fernando J. P.; Oliveira, Carla Padrel de; Oliveira, PauloPor que motivo 2011 foi escolhido para comemorar o Ano Internacional da Química (AIQ). Participação do Professor Jorge Calado, do Departamento de Engenharia Química do Instituto Superior Técnico e Presidente da Comissão Nacional para o AIQ-Ano Internacional da Química 2011.
- Avaliação de uma unidade curricular do programa de doutoramento em Sustentabilidade Social e Desenvolvimento da Universidade Aberta de PortugalPublication . Oliveira, Carla Padrel de; Carmo, Hermano; Caeiro, Sandra
- Contribution of advanced training for real problem solutions within sustainable development goals: the case of an e-learning PhDPublication . Oliveira, Carla Padrel de; Caeiro, Sandra; Trindade, JorgeIn this work, we intend to evaluate the contribution of this e-learning PhD program on Social Sustainability and Development for worldwide real problem solutions, in particular related with the achievement of the Sustainable Development Goals (SDG). The research was conducted for those research plans submitted between 2014 and 2016. A content analysis was applied to those students’ research plans.
- Desafiando o paradigma do ensino da química: o contributo da Universidade Aberta de PortugalPublication . Oliveira, Carla Padrel de; Caetano, Fernando J. P.A Universidade tem, ao longo dos anos, mantido uma enorme capacidade para se transformar e adaptar à evolução do Mundo e esse sentido de mudança é também plasmado na constante procura de novos caminhos, novas ideias e novas soluções. Pretende-se com este artigo apresentar o modelo pedagógico da Universidade Aberta – universidade pública portuguesa de ensino a distância – e em particular a sua aplicação ao ensino da química em contexto de e-learning e no âmbito do curso de 1º ciclo em Ciências do Ambiente. São apresentadas as diferentes estratégias que têm vindo a ser desenvolvidas, nomeadamente o recurso a trabalho experimental, o acesso a laboratórios virtuais e a disponibilização de feedback para as atividades formativas e avaliativas.
- Diisodecylphthalate (DIDP) — a potential standard of moderate viscosity: surface tension measurements and water content effect on viscosityPublication . Oliveira, Carla Padrel de; Caetano, Fernando J. P.; Fareleira, João M. N. A.; Fernandes, Anabela C.; Serro, Ana P.; Almeida, Inês M. Simões de; Wakeham, William A.Our laboratory, along with several others, has been engaged in a project to determine the suitability of diisodecylphthalate (DIDP) as a standard reference material of viscosity for industrial purposes. As a part of that project, we have undertaken a study of the effects of surface tension and of impurities, of that liquid on viscosity measurements with routine, suspended level capillary instruments. For the former purpose, a set of surface tension measurements is reported here for DIDP and two reference standard mineral oils. In particular, surface tension data for DIDP, obtained using a pendant-drop shape-analysis method, at temperatures from 288K to 308K are presented. The present study suggests that surface tension effects upon viscosity measurements with routine capillary viscometers can be important enough to demand that the surface tension of the reference fluid(s) used for their calibration be specified. It is also evident that the surface tension of materials used for calibration may be relevant to their selection if errors arising from surface tension are to be avoided. In order to fulfil these requirements, the surface tension of the reference material should be included in the definition of the standard. The effect of the water content on the viscosity of a sample of DIDP is assessed as a part of the process of determining its suitability as a standard reference material.
- E-Sustainability 2017 : Seminário Doutoral do Doutoramento em Sustentabilidade Social e DesenvolvimentoPublication . Oliveira, Carla Padrel de; Caeiro, Sandra; Trindade, Jorge; Carrilho, Tiago